Learn German: Wer Aufgaben aufschieben will, hat falsche Prioritäten. - Whoever wants to put off tasks has wrong priorities.

In German, the verb in a main clause must be in the second position. Here, the entire first clause (Wer Aufgaben aufschieben will) acts as the subject and takes up Position 1. Therefore, the main verb hat must immediately follow the comma. You will sometimes hear Germans insert a der here (..., der hat...) to make the subject feel more concrete, but the grammar remains the same.

Is wer being used as a question word here?

No. While you first learned wer as the question word "who?", it is also used as an indefinite relative pronoun meaning "whoever," "anyone who," or "he who." It's the most natural way to make general, proverb-like statements in German without needing clunky literal translations like wer auch immer.

I thought aufschieben was a separable verb. Why isn't it separated here?

aufschieben (to put off or postpone) is indeed a separable verb (er schiebt auf). However, because this clause uses the modal verb will (wants to), the main action verb gets pushed to the very end of the clause in its full, unseparated infinitive form.

Why does falsche end in -e?